Welcome to Anvil!
Anvil builds single-page web apps. That is, the page address doesn’t change. Instead, the page contents change. This is generally true for anyone’s single-page web app, not just Anvil’s
But there is a way to simulate URL-based navigation, built by other Anvil users. Check out https://github.com/s-cork/HashRouting and https://github.com/meatballs/anvil-navigation .
Edit: Also see Routing, navigation with URL Hash